8020 Aluminum T-slot Building Systems

Aluminum Roof Rack Crossbar t slot roof rack Or does the rack with the T-slot adapters fitted then slide into the T-slot bar? I am a bit confused Bars: Thule Wingedge Rack: Yakima HighRoad T-slot adapter tutte le slot T-Slot Slats, Running Front to Back; Semi-Elliptical Bottom Cross Braces To Reduce Wind Noise; M6 T-Slot Around Top Perimeter With Rounded Top Edge; 5 Lengths

tokyo slot 88 Heavy Duty rack for Work or fun, Manufactured out of 16 Gauge e-coated steel, it can handle 500 to 1000lbs Static weight Made in the US by Putco Des Moines